Today I got my first EReader Sony Prs T2.
But since I turn on it, the menu is all in Japanese. T_T
How can I use it? May I change it to en or us version?
The FW is 1.0.04.03190.
I just want to change the menu language to English.
Somebody can help me?
If it can be root, it will be more thankful.

It's in regard to other languages, but you probably have to follow the same steps.

If you can figure out which icon on the main screens are for Settings, and press that, the first entry in Settings is usually "General".

On my T1, the Settings icon is on the second page of the main menu, on the lower left side of the screen, with a picture that looks like a toolbox.

Pressing that brings up the Settings screen. General Settings is the first entry on the top of the screen. Does Japanese read right to left? If so, then it would probably be the first column on the right.

Pressing General Settings brings up a sub-menu and Menu Language is the second option down from the top. In a right-left orientation, probably second from the right. If you can get that far, probably any entry you push is going to give you another language, and if you can get to one of the Romance Language ones, you'll have a better chance of figuring out what's what.

You might also want to translate the terms Settings, General Settings, and Menu Language from English to Japanese using one of the online programs and see if you can compare the characters in those words to something showing up on your T2.

"I have some bad news for you. I have Japanese version of PRS-T2 and I also live in Japan. You can't change the language in most Sony's products bought in Japan (incl. Sony Readers, point & shoot cameras etc.) Most Sony's products bought in Japan are only in Japanese. Salesman should have warned you."

http://www.justanswer.com/e-readers/...-language.html
Customer replied 455 days and 3 hours ago.
Thank you for the information but unfortunatly it did not work so I contacted Sony Australia who have now redirected me to Sony Japan as it appeares the Japanese Ereaders are set up only for the one language.
It looks like I have purchased some very expensive paper weights

"I have some bad news for you. I have Japanese version of PRS-T2 and I also live in Japan. You can't change the language in most Sony's products bought in Japan (incl. Sony Readers, point & shoot cameras etc.) Most Sony's products bought in Japan are only in Japanese. Salesman should have warned you."

I've bought several phones and the 650 in Japan. For this kind of devices, it's usually possible to choose between Japanese and English, sometimes other languages too as Portuguese, Chinese, Korean.
Namely, my 650 displays English as well as Japanese menus out of the box. By watching pictures of the English menu, the OP should be able to set the T2 to English (this is something like 3-4 steps top).